u3745bm ATMEL Corporation, u3745bm Datasheet - Page 20

• Manufacturer Part Number: u3745bm
• Description: Receiver
• Manufacturer: ATMEL Corporation

Table 9. Effect of the Configuration Word Lim_min
Table 10. Effect of the Configuration Word Lim_max
Conservation of the Register
Information
20
0
0
0
0
0
1
1
1
0
0
0
0
1
1
1
.
.
.
.
.
.
.
.
.
U3745BM
0
0
0
0
0
1
1
1
Lim_max < 12 is not applicable
0
0
0
1
1
1
1
Lim_min < 10 is not applicable
.
.
.
.
.
.
.
.
.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
.
.
.
.
.
.
.
.
.
Lim_max
Lim_min
0
0
1
1
1
1
1
1
.
.
.
1
1
1
0
1
1
1
.
.
.
.
.
.
The U3745BM has an integrated power-on reset and brown-out detection circuitry to
provide a mechanism to preserve the RAM register information.
According to Figure 18, a power-on reset (POR) is generated if the supply voltage V
drops below the threshold voltage V
the configuration registers in that condition. Once V
celed after the minimum reset period t
voltage of the receiver is turned on.
To indicate that condition, the receiver displays a reset marker (RM) at pin DATA after a
reset. The RM is represented by the fixed frequency f
canceled via an ‘L’ pulse t1 at pin DATA. The RM implies the following characteristics:
•
f
cannot be misinterpreted by the connected microcontroller.
RM
1
1
0
0
1
0
1
1
.
.
.
0
0
1
0
0
1
1
.
.
.
.
.
.
is lower than the lowest feasible frequency of a data signal. By this means, RM
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
.
.
.
.
.
.
.
.
.
(USA: T
(USA: T
ThReset
(T
Lim_max
Lim_max
(T
Lim_min
Lower Limit Value for Bit Check
Upper Limit Value for Bit Check
Rst
Lim_min
. The default parameters are programmed into
. A POR is also generated when the supply
= (Lim_max - 1) ´ XLim ´ T
= 228 µs, Europe: T
= 375 µs, Europe: T
= Lim_min ´ XLim ´ T
14 (Default)
24 (Default)
S
RM
exceeds V
10
11
12
13
61
62
63
12
13
14
61
62
63
at a 50% duty cycle. RM can be
Lim_min
Lim_max
ThReset
Clk
= 232 µs)
= 381 µs)
, the POR is can-
)
Clk
)
4663A–RKE–06/03
S